A Firebrand Departs From GM

General Motors Co.'s tumult deepened on Sunday when the auto maker ousted its global marketing chief, Joel Ewanick, head of one of the largest advertising budgets in the U.S. and a key player in the company's restructuring efforts.

GM told Mr. Ewanick that he was being removed for failing to properly vet the financial details of a European soccer-sponsorship deal that he struck recently, according to people familiar with the...